.knowledge-browser-container {
  padding: 20px;
  background-color: #f0f2f5;
  min-height: 100vh;
}

.knowledge-browser-row {
  height: calc(100vh - 40px);
}

.category-col, .subcategory-col, .article-col {
  height: 100%;
}

.category-card {
  height: 100%;
  overflow-y: auto;
}

.article-card {
  height: 100%;
  overflow-y: auto;
}

.category-item {
  cursor: pointer;
  padding: 10px;
  border-radius: 4px;
  transition: all 0.3s;
}

.category-item:hover {
  background-color: #f5f5f5;
}

.category-item-active {
  background-color: #e6f7ff;
  color: #1890ff;
  font-weight: 500;
}

.category-icon {
  margin-right: 8px;
}

.article-item {
  cursor: pointer;
  padding: 16px;
  border-radius: 4px;
  transition: all 0.3s;
  border-bottom: 1px solid #f0f0f0;
}

.article-item:hover {
  background-color: #f5f5f5;
}

.article-header {
  margin-bottom: 8px;
}

.article-meta {
  display: flex;
  align-items: center;
  margin-top: 8px;
  font-size: 12px;
}

.article-summary {
  color: #666;
  margin-bottom: 0;
}
